Electron Transport in Polymer-Derived Amorphous Silicon Oxycarbonitride Ceramics

    Authors

    Y. S. Wang; T. Jiang; L. G. Zhang;L. A. An

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    CARBONITRIDE CERAMICS; LOCALIZED STATES; HIGH-TEMPERATURE; FILMS; CONDUCTION; CONVERSION; PRECURSOR; NITRIDE; Materials Science, Ceramics

    Abstract

    The electron transport behavior of polymer-derived amorphous silicon oxycarbonitride ceramics is studied by measuring their temperature-dependent electrical conductivities. The experimental results are analyzed using theoretical models. The results reveal that the materials exhibit three conduction mechanisms: conduction in extended states, conduction in band tails, and conduction in localized states. Particularly, it is found that in a low-temperature regime, the conduction of the materials follows a band tail hopping mechanism, rather than the previously assumed variable range hopping mechanism. The results also reveal that energy gaps such as E(C)-E(F) and E(C)-E(A) decrease with increasing pyrolysis temperature.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    92

    Issue/Number

    7

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    1603

    Last Page

    1606

    WOS Identifier

    WOS:000267426500038

    ISSN

    0002-7820

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